I like the idea of attacking yourself and having a few fun battles, inviting whoever the fuck wants to fight to join you. You'd need proper equipment for themed battles, though.
At the same time, this would be rather separate from the Nerd Wars of Strategus. It would be cooler if you used your army to spice things up in the Strat political scene. Attacking a faction out of the blue, for example, would certainly cause fun times to be had. You could use the idea from some other thread, and with the help of a few other nerds pretend to be the bad guys from the song of nerds and ice, invading a faction's territory from the north. You could use 6, 1.5k armies, which would doubtless all fail to capture fiefs... 6 battles, though. Perhaps you could see if anyone else would contribute soldiers to the cause, hmm?
The problem, in any case other than a few organized battles, is that 10k troops is nothing--at least, in EU. It's not enough to make any big ripples in the murky waters (piss and mountain dew) of the Strat scene. Not unless you time things well.